Press.



J. NES ETRIL.

PRESS.

APPLICATION IILED MAR. 6, 1914.

LWQNOL Patented Feb. 16, 1915.

2 SHEETS-SHEET 1.

WiTNESSES [N 1101? A llormy J. NESETRIL.

PRESS. APPLIGATION rim]; MAR. a. 1914 1,]. 29,901 Patented Feb. 16, 1915.

2 SHEBTSSHEBT 2.

A Home THE NORRIS PETERS 60.. PHOTO-7140., WASHINGTUN. D. C.

JAN NEETRIL, OF PRAGUE, AUSTRIA-HUNGARY,

ASSIG-NOR TO JOSEPH PRINCE GOLLOREDO-MANNSFELD, OF DOBRIS, AUSTRIA-HUNGARY.

PRESS.

Specification of Letters Patent.

Patented rears, 1915..

Application filed March 6, 1914. Serial No. 822,981.

To all whom it may concern.

Be it known that I, JAN Nnsn'riun, c tizen of the Austro-Hungarian Empire,'res1d1ng at Prague, II, Austria-Hungary, have invented certain new and useful Improvements in and Relating to Presses, of whlch the following is a specification.

This invention relates to pressingapparatus and has for its object to providean apparatus of the character set forth which is particularly adapted'for use in the manufacture of railway sleepers as described in the specification of my co-pending application filed March 6, 1914, Serial Number 822,983.

The apparatus according to the present invention comprises mainly the combination of adie member, a pressing cavity and a mold adapted to coiiperate one With the other as will be more particularly described hereafter.

The invention also comprises the part1cular construction, combination and arrangement of parts as hereinafter described.

The invention is shown by way of example in the accompanying drawings 1n which Figure 1 is a sectional front View of one preferred form, and Fig. 2 a sectional side elevation corresponding thereto. Figs. 3 and 4 show details.

In carrying the invention into effect according to one mode the press comprises a hydraulic ram consisting of a cylinder 52 and plunger 53 which latter carries the actual press form or pressing cavity 54. Two vertical cylindrical spindles 55 with square screw threads at their upper portions are arranged one on each side of the ram. Vertically movable on. these spindles, by means of two correspondingly screw-threaded sleeves 56, is the die carriage 57 and the pressing die 57, the up and down movement of the said sleeves being effected by worm wheels 58 forming the lower end of the sleeves and engaging with worms 59. The latter are mounted on a suitably journaled common shaft 61 which is adapted to be rotated by means of an electromotor and intermediate gear wheels 160 and 161. The mold 54 is constructed to conform to the shape of a mold 47 adapted to receive the material from a mixer, and its upper longitudinal edges form the continuation of rails 45 for the wheels 46 mold 47.

The mold illustrated is intended to form sleepers of the kind described in my copending application filed herewith, and to this end is provided with core pins 50 and a core plate 51 having enlarged ends 48 to form the bolt holes and recesses in the sleepers required for the rail chairs and tie strap. The core plate 48 also forms a connecting plate for the two parts of the mold which is divided longitudinally, being secured thereto by thumb bolts 49. When the filling box is filled with concrete it is placed on a truck 46 and run into the position indicated in Fig. 1. It is then raised off the truck, the truckis removed and the mold is lowered into the pressing cavity 47 ready for the sleeper to be compressed by the die 57, which has bores 62 to receive the pins 50.

he removal of the mold 47 from the truck 46, the lowering into the pressing cavlty 54, the removal therefrom' and the loading on the truck is effected by means of a special device. For this purpose I make provision on the upper portion of the die carriage 57 and at each end thereof of a double armed pivoted lever 63, Figs. 1 and 3, of which the upper arm carries an adjustable weight 64 and the lower arm integral pins 65 extending at either side of the end of said lower arm. of the mold 47 are provided with hooks 66 and 67 respectively, the corresponding hooks abutting and forming a recess 68 to permit of engagement therein of the lower arm of the lever 63 and allowing simultaneous engagement of the pairs of pins 65 with the two hooks. The tops 67 of the hooks are slanting or form cam surfaces in order that the pins 65, when the die is lowered, may be guided down and outward and each pair of pins, owing to the weight on the upper arm of the levers, become automatically engaged. In this way the mold 47 is suspended from the die carriage 57 and the truck 46 can then be moved away from the press. Upon the lowering of the die carriage 57 and die 57 the mold 47 is placed in the pressing cavity 54 and the pressing of the sleeper is effected. After this is done the mold 47 is again lifted clear by means of the device de scribed and if the truck 46 is once again moved into the position shown in Fig. 1 and of a truck 46 carrying the The two parts or halves the die carriage 57 slightly lowered, the levers 63 may be disengaged to drop the mold into the truck which, with its load, can then be removed. In order to facilitate the raising of the mold out of the pressing cavity, auxiliary rams may be provided to relieve the weight on the hooks and on the pins 65 of the levers 63. The auxiliary rams can then be lowered leaving the mold suspended to permit of the truck a6 being run under -.to receive it. The auxiliary rams are indicated at 71 and they have plates for engaging with the bottom of the mold.

I claim 1. Apparatus for compressing concrete sleepers and like articles, comprising a pressing cavity, a mold, and a die, a carriage for said die, said die carriage having detachable means for holding said mold above said pressing cavity, means for moving the die carriage toward the pressing cavity so as to lower the mold therein, and means for moving the pressing cavity relatively to the die for the purpose of compressing the contents of the mold, substantially as hereinbefore set forth.

2. Apparatus for compressing concrete sleepersvand the like articles, comprising a pressing cavity, a hydraulic ram supporting said pressing cavity, a mold having hooks, a die carriage having a die, pivoted levers on said die carriage adapted to cooperate with said hooks to hold the mold in contact with the die, and means for raising and lowering the die carriage to raise and lower the mold from and into the aforesaid pressing cavity, substantially as and for the purpose hereinbefore set forth.

3. Apparatus for compressing concrete sleepers and the like articles, comprising a pressing cavity, a hydraulic ram supporting said pressing cavity, a mold having hooks, a die carriage having adie, pivoted levers on said die carriage adapted to cooperate with said hooks to hold the mold in contact with the die, and means for raising and lowering the diecarriage to raise and lower the mold from and into the aforesaid pressing cavity, consisting of stationary screw threaded spindles, rotary screw threaded sleeves carried by the die carriage and engaging with said spindles, and means for rotating said sleeves, substantially as and for the purpose hereinbefore set forth.

4L. Apparatus for compressing concrete sleepers and the like articles, comprising a pressing cavity, a hydraulic ram for supporting said pressing cavity, a mold having hooks, a die carriage having a die, weighted levers pivoted on said die carriage adapted to cooperate with said hooks to hold the mold in contact with the die, and means for raising and lowering the die carriage to raise and lower the mold from and into the aforesaid pressing cavity, consisting of stationary screw threaded spindles, rotary screwthreaded sleeves carried by the diecarriage, worm wheels on said sleeves, a worm shaft engaging with said worm wheels and an electric motor for rotating said worm shaft, substantially as and for the purpose hereinbefore set forth.

5. Apparatus for compressing concrete sleepers and the like articles, comprising a pressing cavity, a mold, and a die, a carriage for said die, detachable means on the carriage for holding the mold in uxtaposition to said die, means for raising and lowering the die carriage to raise and lower the mold from and into the pressing cavity, a hydraulic ram for pressing the mold against the die when lowered therein and auxiliary rams for assisting in the raising of the mold from the pressing cavity, substantially as hereinbefore set forth.

6. Apparatus for compressing concrete sleepers and the like articles, comprising a pressing cavity, a mold, and a die, a carriage for the die, automatic means carried by the die carriage for engaging with and holding the mold, rails on the pressing cavity, a truck adapted to run thereon, means for raising and lowering the die carriage, and a hydraulic ram for raising and lowering the pressing cavity, substantially as and for the purpose hereinbefore set forth.

7. Apparatus for compressing concrete sleepers and the like articles, comprising a die carriage having a die, a two part mold having a core plate adapted to hold said parts together, means on the die carriage for holding said mold, a pressing cavity, a hydraulic ram supporting said pressing cavity, and means for raising and lowering the die carriage to raise and lower the mold from and into said pressing cavity, substantially as and for the purpose hereinbefore set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. v v

JAN NESETRIL.

Witnesses:

J osnr ZEIBROKIOH, JAN B. VoJAonK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

